Threading-die.



IATBNTED JULY '24, 1906.

W. RICHMOND. THRBADINQ DIE.

APFLIUATIOE rum) nov. 22. 1904.

st w ww- UNITED STATES PATITENT OFFICE.

THFIEADING-DIE.

Speoificsition of Letters Iaitant.

Patented July 24, 1906.

Applinafiofl film Novamber 22,1904. Serial Kc, 233,838

Tn In whom if may mun-wrm Be it known that l, Wsmnm RICHMOND, of the city of London, in tho county ol Middlesex, in the Province of Ontario, (unadzn have invented certain urw and usrlul lingrovemenis in lhreading-l)ivs, of which the allowing is a specification.

My invention relates to improvements in ,dies for t-hrnading pipes, cylindrical cups,

studs, pins, holtis,&o.; and the object of the invention is to devise a, holdrr for the dies by which the length of the thread may be accurately gagnd and the dies withdrawn alter a determinate n ovvmrnt without re versing the drivingshaft: and it oonsisls,

Pssrntially, of B. dio-holrlvr l'irovidnri with an lnto n lhrvndml hole in lhu innrr 0nd of ilir.

plun er, a collar ndjustably secured on the slum c, a, supplemental collar loonlind between the lmdy ol tho din-holder and the aforesaid Collin and provided with a. four-ratchet designed to uonct with ihr ends of the dies, and inlernul substantially V-shapod groovrs designed in moot wilh iho pin nxtvnding through 'lhr plungt-r, so as to turn the collar and bring tho face-ratchet into position to release t-hn dim, the parts bring otherwise oonsitruutd and arranged in detail as hereinafter more particularly vxpluinod.

Figure l is a. pvrsnvotivc View, partially in section. of my div-holdnr oomplrln. Fig. 2 is a. longitudinal section through lhu dioholdnr. Fig. is ii. longitudinal suction, and Fig. 4 a sectional pnrnpnctivo detail of the adiuslnlilo oollnr wlwrnhy the. divs urn operated and withdrawn.

In the drawings, like letters of rvfvrvnoo indicate corrrsponding ports in our-h ligurn.

'llu holder which I shall now dvsorihn is designrd for application to on nipprnprintn part of a machine, us the spindlv of u lnihe or the turroihon-of.

A is l-lli diwhody, which is providod with slots (1 and in which urn located the Quintin"- dies ll. it will lw noticrd that he div-hm y is tapered and l-hr slots oorruspoudingiy so,

in order to rrcaive the dies B, which are reliiinpd in position lay a ring held in place on th? lagwrrd diediody by the screws l).

'lhv div ll is provided with the usual cut ting and b and is preferably made in two parts connnnted l-ognahrr by a lock-joint- B, Sill) slaniiully as shown, the udvanta a being that whvn thr lowrr portion of the die is worn it mm lin rnplacvd.

The body A is provided with a central orifice u and a shrink A, having a reduced and A The drank A is provided with the ex tnrniil threniln and has a central orifice n9 us indianted, and diametrically arranged slots a,

E is a central plunger filling {he orifice a mid irovidnd with a rvduoed lowor threaded and having a gaiging nnl e, as indicated such gugiiig-nul lining dosigned to limit the movement of the dies in cutting the pipe, or, in oiher words, to determine the length of the thread.

The plunger E has a. reduced upper and E and hotwi-vn the shoulder on the plunger lornivd hy this reduced and and the too of the orifice a) and nnnircling the plunger ex tends a spiral sprin F G is a screw-pin which rxtends through the plungrr intcrinmliain of its length and through the slots (9. rr" is an orifice having a reduced lownr and a", such orifice being made in the shank, as indicatied, and rxtending down to the orifinn (2 H is an mljusiing-screw, which his into the orilicrs a a. and extends into a threaded 0ri line a in the plun er. By means of the adjustingwzcrew H t a position of the plunger, and consequently the screw-pin G, may be varied for a. purpose which will hereinafter npiwar.

is a collar which its the shank A, and is provided with n face-ratchet on tho bottom face dvsignrd to but the end of the die B. The collar l nuiy lne adjusted by means of n spanner dvsignrd to o crate in the holes '5'. l he collar l is provide with an annular rarewny i0 rrrrive thr balls J, which reduce the lririion lietwnrn the oollnrn i and K, which lnller roliiir is also provided with an annular rid-own lit, into which the halls extend, The collar K is srrewod on the nppnr threaded 0nd of lilill shank and may lin adjusted by a spim'unr and fastened in any diflilltl position by a suitable sobsorew k.

in tho fare-ratchet 1 there tooth ms dies B, and in case a tapered are as m any thread are la-rol al oll as at i is dosignod to ho made the ends oi the te th The dies 13 nor ran-hol lfl living lltlt'l in ptkillltl ll against thi- MtliH l)\ spring-pressed plungi-rs li, abutting i i i the lill'tlttltY-(HH(lltlllltl pins I), fixed in the upper ('llll ol: the dies l).

'l'ho. i-ollar l is provided with an internal lHllI' havin formed therein illt substantialiy ron'rse V-shaped rer'osses l", w lllt'l] are formed lltt \\'t'lll tho ni'ajor projeotin portions if and the minor projecting portions i By adjusting the plunger ll vertirally the pin (.3 is brought into tin proper operative posit ion oirouniferiaitially opposite the )rojorh ing portions 1' and at. the left hand of the Hzllllt. (See Fig. 4.)

The dininetrical distani-e of the ruttm's lltllll each other regulated by adjusting the vollars li and. l and the plunger l1] so as to bring; the pins into proper operative position the farther up the collars being raised the greater being the diameter which the tool will cut, and vice versa.

As the holder with the dies caused to 1 move onwardly onto the pipe or other artiole operated upon the pin G at about the limit of the movement contacts with the side of the V-s taped recess i i, and thereby forces the collar in the direi'tion indicated by arrow. thus bringing the face-ratchet 1" around until the dies 15 come opposite the bases of the ratchet-teeth, when the spring-pressed plun ger forres the dies outnon'dlv into the base of the teeth and the dies witiidrawn from the cutting position.

a beveled end 1 to eiioh tooth, which allows of the dies to pass gradually outwardly and be withdrax 'n from the work, thus necessarily following the taper.

'lo restore the l'flllzlt in illl proper operall\'(' position, so :Ls to tiring tho i'rown upon tho lop ol' tho divs again, it is f-lill|)l news- Sat V10 turn tho t'tlllill l around h a spanner.

It will now he win that !Il inu'ntion is simple uinl oilioiont to attain the result do sired.

What l (lilllll as in) inwniion is l. 'lhe lllllllllllrllltlil ith lho tapered diobody provided with a ventral oritii'o and the dies ini'linedlr set, and the shank of thediw l)()ll harin an oritii-iextending up into the. same from the orili o in the div-inuty and diametrieal slots u and the plunger 'littinginthe orifice in the shank and the pin extending through the plunger and the slots (1, of the rollar provided with a laiee-i'aticlietengaging with the dies and internal V-shaped roi'esses with which the pin is designed to count wnd means for preventing longitudinal movement of the collar as and f r the purpose specified.

2. The combination with the tapered diebody provided with a ventral orifice and the dies int'linedly set, and the shank of the die body having an oritiee extending up into the same from the orifirio in the die-body and diainetrioal slots, and the plunger fitting in Ishe orifice in the shank and tho pin extending through the plunger and diann-Lrieal slots. of the collar provided with a fiiiae-riitelmt engaging the dies and internal V-shapod rerosses withwhii-h the pin is designed to eoaotnnoans for preventing longitudinal movement of the collar and means looatod Wit hin the die-boih and operating against the dies to form-i the 3 same against the rati-liet-face of the collar as If the article to be cut is tapered, I provide and for the purpose specified.

WlLldAM RICHMOND. Witnesses J. EfiDonna. '1. H. LUSLNJM-BE. 

